NORME INTERNATIONALE CEI IEC INTERNATIONAL STANDARD 61248 7 QC 260600 Première édition First edition 1997 06 Transformateurs et inductances destinés aux équipements électroniques et de télécommunicati[.]
Généralités
3.1.1 Lorsque des essais supplémentaires d'un type non défini ou évoqués dans la présente spécification ou dans la CEI 61007 sont requis, ils doivent être pleinement spécifiés dans la spécification particulière.
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IEC 60068-2-20: 1979, Environmental testing – Part 2: Tests – Test T: Soldering
IEC 60068-2-21: 1983, Environmental testing – Part 2: Tests – Test U: Robustness of terminations and integral mounting devices
IEC 60068-2-27: 1987, Environmental testing – Part 2: Tests – Test Ea and guidance: Shock
IEC 60068-2-29: 1987, Environmental testing – Part 2: Tests – Test Eb and guidance: Bump
IEC 60410:1973, Sampling plans and procedures for inspection by attributes
IEC 61007: 1994, Transformers and inductors for use in electronic and telecommunication equipment – Measurement methods and test procedures
IEC 61248-1: 1996, Transformers and inductors for use in electronic and telecommunication equipment – Part 1: Generic specification
ISO 128:1982,Technical drawings – General principles of presentation
ISO 129:1985, Technical drawings – Dimensioning – General principles, definitions, method of execution and special indications
3 Preparation of the detail specification
This standard is intended to be used for the preparation of detail specifications for high- frequency inductors and intermediate frequency transformers released under the terms of the
IEC 61248-1 (QC 260000) capability approval procedure.
This article is designed for two main audiences: first, customers seeking to acquire high-frequency inductors and intermediate frequency transformers that align with the approved capabilities of their component manufacturers, such as detailed specifications (DS); second, manufacturers of high-frequency inductors and intermediate frequency transformers who have received capability approval and wish to create specifications for their own products within the limits of that approval.
The detailed specification must adhere to the BDS format outlined in clause 5, especially regarding the front page layout and the overall presentation of the inspection requirements.
All tests in the BDS, except for the rotating torque, pressure characteristics, adjusting mechanism strength, resonance frequency, and inductance tests in annex A, are derived from IEC 61007 The underlined tests are critical operating characteristics and should be chosen by the specification writer for the detail specification Tests in plain type are provided for convenience, and selection should be based on the specific application of the component.
3 The specification writer may specify tests and sampling levels different from, less than, or additional to those given in the BDS.
3.1.1 Where additional tests of a type not defined or invoked in this specification or
IEC 61007 are required, these shall be fully specified in the detail specification.
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3.1.2 Tout essai considéré comme destructif doit être signalé comme tel dans le programme d'essais par l'addition de la notation ô(D)ằ.
NOTE – L'utilisation de cette notation n'est pas illustrée dans la BDS.
Tests should be organized in the program according to the sampling level and, unless stated otherwise, in the required order When 100% testing is not necessary, control levels and acceptable quality levels must be selected accordingly.
3.1.4 L'initiateur doit attribuer à la spécification particulière remplie un numéro d'identification du composant et un numéro d'édition.
1 Ce numéro est choisi par l'initiateur (fabricant ou client) dans son propre système Il n'est ainsi pas soumis à des règles ou à une codification extérieures.
In the case of a manufacturer's specific request for a standard item from their catalog to be listed in the IEC QC 001004, the national committee will assign an appropriate number from its registry.
Additionally, the component manufacturer must assign a specific number to the particular specification, which includes the number of the current specification, the factory identification code letters, and a unique number from their recording system.
NOTE – Une fois que le numéro de référence du fabricant a été attribué à une spécification particulière selon
3.1.5, cette spécification est considérée comme partie contractuelle de la commande Il convient que les copies de toutes ces spécifications particulières soient conservées par le contrôleur du fabricant.
Valeurs et caractéristiques
In cases where specific requirements are established by the client, it is essential to reach an agreement between the client and the manufacturer regarding the values assigned to the component in the particular specification These values must remain within the manufacturer's area of expertise.
(voir aussi 1.12 de la CEI 61248-1).
Un client doit prescrire dans la spécification particulière toutes les caractéristiques requises pour le composant.
Croquis d'encombrement et schéma des enroulements
The specific specification must include a sketch of the transformer that highlights key features, such as dimensions that may affect interchangeability, mounting limitations, and marking requirements.
3.3.2 La spécification particulière doit contenir un diagramme schématique montrant tous les enroulements, écrans, prises et phases, et donnant l'identification des connexions de sortie.
4 Exigences de contrôle à inclure dans la spécification particulière
Contrôle de la conformité
La spécification particulière doit contenir les notes suivantes:
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3.1.2 Any tests considered as being destructive shall be so denoted in the test schedule by the addition of the notation '(D)'.
NOTE – The use of this notation is not illustrated in the BDS.
Tests should be organized in the schedule based on the required sampling level and, unless specified otherwise, in the sequence of testing needed If 100% testing is not mandated, inspection levels and acceptable quality levels must be chosen according to IEC 60410.
3.1.4 The completed detail specification shall be allocated a component identity number and issue status by the originator.
1 This number is chosen by the originator (manufacturer or customer) within his own system It is thus not subject to any external rules or codification.
For a manufacturer's detailed specification of a standard catalogue item to be included in IEC QC 001004, the national committee will assign a suitable number from its register.
The detail specification must include a number assigned by the component manufacturer, which consists of the specification number, the factory identification code letters, and a unique identifier from their registration system, such as QC 260600/PQR/1234.
After a detail specification number is assigned based on the manufacturer's reference number, it becomes a contractual component of the order, as outlined in section 3.1.5 The manufacturer's chief inspector must keep copies of all detail specifications.
In the case of customer-originated detail specifications, customer and manufacturer agreement shall be obtained on the ratings to be ascribed to the component in the detail specification.
These ratings shall not exceed the scope of the manufacturer's capability approval (see also
A customer shall prescribe in the detail specification any characteristic required for a component.
3.3 Outline drawings and winding schematic diagram
3.3.1 The detail specification shall incorporate a drawing of the transformer showing important features, such as those dimensions affecting interchangeability, restrictions on mounting and marking requirements.
3.3.2 The detail specification shall incorporate a schematic diagram showing all windings, screens, taps and phasings and giving termination identification.
4 Inspection requirements to be listed in the detail specification
The detail specification shall incorporate the following notes:
Sampling control must be conducted according to IEC 60410, following standard procedures Tests within a group can be performed in any order unless specified otherwise Components subjected to any test marked (D) should not be accepted under the QC 260000 approval process, as (D) indicates destructive testing The limit values provided are absolute values, and the measurement uncertainty must be taken into account.
General
3.1.1 Where additional tests of a type not defined or invoked in this specification or
IEC 61007 are required, these shall be fully specified in the detail specification.
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3.1.2 Tout essai considéré comme destructif doit être signalé comme tel dans le programme d'essais par l'addition de la notation ô(D)ằ.
NOTE – L'utilisation de cette notation n'est pas illustrée dans la BDS.
Tests should be organized in the program according to the sampling level and, unless stated otherwise, in the required order When 100% testing is not necessary, control levels and acceptable quality levels must be selected accordingly.
3.1.4 L'initiateur doit attribuer à la spécification particulière remplie un numéro d'identification du composant et un numéro d'édition.
1 Ce numéro est choisi par l'initiateur (fabricant ou client) dans son propre système Il n'est ainsi pas soumis à des règles ou à une codification extérieures.
In the case of a manufacturer's specific request for a standard item from their catalog to be listed in the IEC QC 001004, the national committee will assign an appropriate number from its registry.
Additionally, the component manufacturer must assign a specific number to the particular specification, which includes the number of the current specification, the factory identification code letters, and a unique number from their recording system.
NOTE – Une fois que le numéro de référence du fabricant a été attribué à une spécification particulière selon
3.1.5, cette spécification est considérée comme partie contractuelle de la commande Il convient que les copies de toutes ces spécifications particulières soient conservées par le contrôleur du fabricant.
In cases where specific requirements are established by the client, it is essential to reach an agreement between the client and the manufacturer regarding the values assigned to the component in the particular specification These values must remain within the manufacturer's area of expertise.
(voir aussi 1.12 de la CEI 61248-1).
Un client doit prescrire dans la spécification particulière toutes les caractéristiques requises pour le composant.
3.3 Croquis d'encombrement et schéma des enroulements
The specific specification must include a sketch of the transformer that highlights key features, such as dimensions that may affect interchangeability, mounting limitations, and marking requirements.
3.3.2 La spécification particulière doit contenir un diagramme schématique montrant tous les enroulements, écrans, prises et phases, et donnant l'identification des connexions de sortie.
4 Exigences de contrôle à inclure dans la spécification particulière
La spécification particulière doit contenir les notes suivantes:
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3.1.2 Any tests considered as being destructive shall be so denoted in the test schedule by the addition of the notation '(D)'.
NOTE – The use of this notation is not illustrated in the BDS.
Tests should be organized in the schedule based on the required sampling level and, unless specified otherwise, in the sequence of testing needed If 100% testing is not mandated, inspection levels and acceptable quality levels must be chosen according to IEC 60410.
3.1.4 The completed detail specification shall be allocated a component identity number and issue status by the originator.
1 This number is chosen by the originator (manufacturer or customer) within his own system It is thus not subject to any external rules or codification.
For a manufacturer's detailed specification of a standard catalog item to be included in IEC QC 001004, the national committee will assign a suitable number from its register.
The detail specification must include a number assigned by the component manufacturer, which consists of the specification number, the factory identification code letters, and a unique identifier from their registration system, such as QC 260600/PQR/1234.
After a detailed specification number is assigned based on the manufacturer's reference number, it becomes a contractual component of the order, as outlined in section 3.1.5 The manufacturer's chief inspector must keep copies of all such detailed specifications.
Ratings and characteristics
In the case of customer-originated detail specifications, customer and manufacturer agreement shall be obtained on the ratings to be ascribed to the component in the detail specification.
These ratings shall not exceed the scope of the manufacturer's capability approval (see also
A customer shall prescribe in the detail specification any characteristic required for a component.
Outline drawings and winding schematic diagram
3.3.1 The detail specification shall incorporate a drawing of the transformer showing important features, such as those dimensions affecting interchangeability, restrictions on mounting and marking requirements.
3.3.2 The detail specification shall incorporate a schematic diagram showing all windings, screens, taps and phasings and giving termination identification.
4 Inspection requirements to be listed in the detail specification
Conformance inspection
The detail specification shall incorporate the following notes:
Sampling control must be conducted in accordance with IEC 60410, following standard control procedures Tests within a group can be performed in any order unless specified otherwise Components subjected to any test marked (D) should not be accepted under the QC 260000 approval, as (D) indicates destructive testing The limit values provided are absolute values, and the measurement uncertainty must be taken into account.
The tests outlined in this section are deemed unsuitable for acceptance after lot-by-lot testing, yet they are appropriate for verifying original and new designs Consequently, these tests are conducted only when explicitly specified in the order, and the particular specification must include instructions regarding this requirement.
If design verification is necessary, the specific number of specimens and the requirement for no failures must be clearly stated in the particular specification.
NOTE – Il est généralement recommandé de fournir deux spécimens, sauf indication contraire.
La BDS qui suit, lorsqu'elle est remplie selon l'article 3, doit servir de base à la spécification particulière applicable.
The first page of the BDS is tailored to meet the specific requirements of the client If a particular manufacturer's specification is needed, some adjustments may be necessary; however, the fundamental layout should remain intact.
Sampling inspection will be conducted following IEC 60410 standards for normal inspection, and tests within a group can be performed in any sequence unless specified otherwise.
Components undergoing tests marked as (D) are not eligible for release under QC 260000 capability approval, as (D) indicates destructive testing Additionally, the specified measurement limits are absolute values, and it is essential to consider measurement uncertainty.
Design verification
The tests outlined here are deemed unsuitable for lot-by-lot release by the specification writer, yet are essential for verifying new and original designs These tests will only be conducted when explicitly mentioned in the order, and the detailed specification will include a statement to this effect.
If design verification is required, the number of specimens and the requirement that there shall be no failures shall be stated in the detail specification.
NOTE – Two specimens should normally be provided, unless otherwise stated.
The BDS which follows, when completed in accordance with clause 3, shall form the relevant detail specification.
The front page of the BDS is designed to accommodate a customer's detailed specifications While modifications may be needed for a manufacturer's specifications, the fundamental format should remain consistent.
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Page 1 (sur 7) Numéro d'identification du composant donné par l'initiateur
SOUS ASSURANCE DE LA QUALITÉ:
SPÉCIFICATION PARTICULIÈRE CONFORME À LA CEI 61248-7
INDUCTANCE À HAUTE FRÉQUENCE ET TRANSFORMATEUR À FRÉQUENCE INTERMÉDIAIRE
1) Type de noyau et type de construction
2) Gamme de modèle de noyaux, gamme de fréquences, gamme d'inductances, facteur Q
Pour les détails sur les dimensions et le diagramme schématique, voir page 7.
Registre des agréments IECQ (QC 001005, Partie 2, Section 1)
Numéro de référence du fabricant
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Sheet 1 (of 7) Originator's component identity number
Specification available from: ISSUE STATUS
ELECTRONIC COMPONENTS OF ASSESSED QUALITY:
DETAIL SPECIFICATION IN ACCORDANCE WITH IEC 61248-7
HIGH-FREQUENCY INDUCTOR AND INTERMEDIATE FREQUENCY TRANSFORMER
1) Core type and type of construction
2) Range of core size, frequency range, inductance range, Q factor
For detail dimensions and schematic diagram see sheet 7.
IECQ register of approval (QC 001005, Part 2, Section 1)
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Inductance à haute fréquence et transformateur à fréquence intermédiaire selon la CEI 61248-7 (QC 260600) ÉDITION
VALEURS ET CARACTÉRISTIQUES (voir 3.2 de la CEI 61248-7) DATE
Catégorie climatique (voir 3.2.2.2 de la CEI 61248-1 (QC 260000))
Gamme de température maximale (stockage/transport)
Robustesse des sorties (voir CEI 60068-2-21)
Variations rapides de température (voir essai Na de la CEI 60068-2-14)
Essai continu de chaleur humide (voir CEI 60068-2-3)
Gamme de fréquences et réponse
Charge Rapport de transformation des tensions
Caractéristiques de la température à la fréquence de résonance ou inductance
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Sheet 2 (of 7) Originator's component identity number
High-frequency inductor and intermediate frequency transformer according to IEC 61248-7 (QC 260600)
RATINGS AND CHARACTERISTICS (see 3.2 of IEC 61248-7) DATE
Climatic category (see 3.2.2.2 of IEC 61248-1 (QC 260000))
Maximum temperature range (storage/transport)
Robustness of terminations (see IEC 60068-2-21)
Rapid change of temperature (see test Na of IEC 60068-2-14)
Damp heat, steady state (see IEC 60068-2-3)
Temperature characteristics at resonant frequency or inductance
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Inductance à haute fréquence et transformateur à fréquence intermédiaire selon la CEI 61248-7 (QC 260600) ÉDITION
EXIGENCES DE CONTRÔLE (voir notes) DATE
Exigences de contrôle et conditions d'essai NQAE
VÉRIFICATION DE LA CONCEPTION SEULEMENT: deux spécimens, pas de défaillances (voir 4.2 de la CEI 61248-7)
Design verification control includes the tests listed below, along with any additional tests selected for compliance verification Design verification tests should only be conducted if they are specifically mentioned in the applicable order.
Risques du feu Comme requis 4.5.16
Caractéristique sous pression Comme requis – 2)
Force du mécanisme de réglage
CONTRÔLE EN COURS DE FABRICATION: effectué pendant la fabrication si un écran de protection est spécifié.
Positionnement de l'écran de protection
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Sheet 3 (of 7) Originator's component identity number
High-frequency inductor and intermediate frequency transformer according to IEC 61248-7 (QC 260600)
INSPECTION REQUIREMENTS (see notes) DATE
TEST IL AQL IEC 61007 reference
Performance requirements and conditions of test SAQL
DESIGN VERIFICATION ONLY: Two specimens, no failures (see 4.2 of IEC 61248-7)
Design verification inspection comprises those tests listed below plus all those selected for conformance inspecton.
Design verification tests shall only be performed when specifically invoked by the relevant order.
Characteristic under pressure As required – 2)
IN PROCESS INSPECTION: conducted during manufacture if a safety screen is specified.
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Inductance à haute fréquence et transformateur à fréquence intermédiaire selon la CEI 61248-7 (QC 260600) ÉDITION
EXIGENCES DE CONTRÔLE (voir notes) DATE
Exigences de contrôle et conditions d'essai ESSAIS SUR COMPOSANT TERMINÉ
Dimensions et procédure de calibration
Rapport de transformation des tensions
Il est recommandé que les ESSAIS DE TRANSMISSION soient choisis à partir des trois essais suivants 2)
Inductance effective et résistance effective
1) Il convient que cet essai soit effectué après l'essai de tension de tenue.
2) Il convient qu'au moins un essai soit spécifié.
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Sheet 4 (of 7) Originator's component identity number
High-frequency inductor and intermediate frequency transformer according to IEC 61248-7 (QC 260600)
INSPECTION REQUIREMENTS (see notes) DATE
TEST IL AQL IEC 61007 reference
Performance requirements and conditions of test TEST ON COMPLETED COMPONENTS
TRANSMISSION TESTS should be selected from the following three tests 2)
Effective inductance and effective resistance
1) This test should be performed after the voltage proof test.
2) At least one test should be specified.
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Inductance à haute fréquence et transformateur à fréquence intermédiaire selon la CEI 61248-7 (QC 260600) ÉDITION
EXIGENCES DE CONTRÔLE (voir notes) DATE
Exigences de contrôle et conditions d'essai ESSAIS SUR COMPOSANT TERMINÉ (suite)
II 0,25 4.4.2.3 A effectuer sous conditions atmosphériques normales
Gamme d'accord de la fréquence de résonance
Gamme d'accord de l'inductance assignée
Résistance des enroulements en courant continu
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Sheet 5 (of 7) Originator's component identity number
High-frequency inductor and intermediate frequency transformer according to IEC 61248-7 (QC 260600)
INSPECTION REQUIREMENTS (see notes) DATE
TEST IL AQL IEC 61007 reference
Performance requirements and conditions of test TESTS ON COMPLETED COMPONENTS (continued)
II 0,25 4.4.2.3 To be carried out under standard atmospheric conditions
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Inductance à haute fréquence et transformateur à fréquence intermédiaire selon la CEI 61248-7 (QC 260600) ÉDITION
EXIGENCES DE CONTRÔLE (voir notes) DATE
Exigences de contrôle et conditions d'essai ESSAIS SUR COMPOSANT TERMINÉ (fin)
Ajouter les essais complémentaire requis:
1 Le contrôle par échantillon doit être exécuté selon la CEI 60410, mode normal.
2 Les essais dans un groupe peuvent être exécutés dans n'importe quel ordre, sauf indication contraire (voir 3.1.3 de la
3 Les composants soumis à tout essai marqué (D) ne doivent pas être acceptés sous l'agrément de savoir-faire de la
4 Les valeurs données comme mesures limites sont des valeurs absolues: il faut tenir compte de l'imprécision des mesures.
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Sheet 6 (of 7) Originator's component identity number
High-frequency inductor and intermediate frequency transformer according to IEC 61248-7 (QC 260600)
INSPECTION REQUIREMENTS (see notes) DATE
TEST IL AQL IEC 61007 reference
Performance requirements and conditions of test TESTS ON COMPLETED COMPONENTS (concluded)
Insert additional tests as required:
1 Sampling inspection is to be carried out in accordance with IEC 60410, normal inspection.
2 Tests in a group may be carried out in any order, except where otherwise indicated (see 3.1.3 of IEC 61248-7).
3 Components submitted to any tests marked (D) may not be released under IEC 61248-1 (QC 260000) capability approval.
4 The values given for measurement limits are absolute values: measurement uncertainty is to be taken into account.
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Inductance à haute fréquence et transformateur à fréquence intermédiaire selon la CEI 61248-7 (QC 260600) ÉDITION
Croquis selon l'ISO 128 et l'ISO 129
Croquis (voir 3.3.1 de la CEI 61248-7):
Nom du fabricant ou marque de fabrication
Numéro du lot de fabrication ou codage de la date de fabrication
Schéma (voir 3.3.2 de la CEI 61248-7):
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Sheet 7 (of 7) Originator's component identity number
High-frequency inductor and intermediate frequency transformer according to IEC 61248-7 (QC 260600)
Drawing in accordance with ISO 128 and ISO 129
Manufacturer's name or trade mark
Production lot number or date code
Schematic diagram (see 3.3.2 of IEC 61248-7):
as a minimum position to be indicated as a minimum position to be indicated
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Méthodes d'essai particulières aux bobines ou transformateurs à fréquence intermédiaire
Le dispositif doit être un appareil de mesure de couple rotatif qui peut mesurer le moment de torsion du noyau de réglage avec précision.
Install the intermediate frequency transformer (IFT) for testing with the adjustment core slot facing upwards Gently rotate the adjustment core using a screwdriver or a similar tool, both clockwise and counterclockwise at a steady speed Check whether the torque values of the adjustment core meet the specifications outlined in the particular requirements.
A.1.3 Articles à spécifier dans la spécification particulière
L'article suivant doit être spécifié dans les spécifications particulières:
A.1.3.1 Forme de l'outil de réglage (si nécessaire, voir A.1.2)
Le dispositif doit être capable de maintenir la force spécifiée dans le tableau A.1.
Measure the resonance frequency while applying the specified force from Table A.1 to the upper surface of the tuning core of the coil or the IFT under test, using a cylindrical resin rod, unless otherwise stated in the specific specification Remove the force and measure the resonance frequency again, then calculate the change in resonance frequency after the removal of the applied force from the device.
Diamètre extérieur D de la vis de réglage mm
D ≤ 3 Comme spécifié dans la spécification particulière
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Test methods peculiar to coils or intermediate frequency transformers
The device shall be a rotating torque measuring apparatus which can measure the torsional moment of the adjusting core accurately.
To test the coil or intermediate frequency transformers (IFT), position the component with the groove of the adjusting core facing upward Use an adjusting driver to rotate the core steadily in both clockwise and counter-clockwise directions, and check if the rotating torques meet the values outlined in the detailed specifications.
A.1.3 Items to be specified in detail specification
The following item shall be specified in detail specifications.
A.1.3.1 Shape of adjusting driver (if necessary, see A.1.2)
The device shall be capable of maintaining the force specified in table A.1.
To measure the resonance frequency, apply the specified force from table A.1 to the upper surface of the adjusting core of the coil or IFT being tested using a cylindrical resin rod, unless stated otherwise in the detailed specifications After removing the force, measure the resonance frequency again and calculate the change in resonance frequency resulting from the removal of the applied force.
Outside diameter of adjusting screw, D mm
D ≤ 3 As specified in the detail specification
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A.2.3 Articles à spécifier dans la spécification particulière
Les articles suivants doivent être spécifiés dans les spécifications particulières: a) forme du bâtonnet cylindrique de pressurisation en résine (si nécessaire) (voir A.2.2); b) force de pressurisation (voir A.2.2).
A.3 Robustesse du mécanisme de réglage
A.3.1 Robustesse de la butée de rotation
Le dispositif doit être un appareil de mesure de couple rotatif qui peut mesurer le moment de torsion du noyau de réglage avec précision.
Mount the coil or IFT for testing with the adjustment core groove facing upwards Gently turn the adjustment core using a screwdriver or a similar tool, rotating it clockwise and counterclockwise at a steady speed of approximately.
At a rotation speed of 10 tours per minute, apply the specified torque from Table A.2 to the rotation stop of the adjustment core at both ends of the rotation method.
Unless otherwise specified in the particular specification, the examination of the specimen should be conducted within 5 seconds to check for core breakage, rotation stop damage, and play in the adjustment core stroke.
Tableau A.2 – Couple pour mesurer la robustesse de la butée de rotation
Diamètre extérieur D de la vis de réglage mm
D ≤ 3 Comme spécifié dans la spécification particulière
A.3.1.3 Articles à spécifier dans la spécification particulière
Les articles suivants doivent être spécifiés dans les spécifications particulières: a) couple rotatif (voir A.3.1.2); b) forme de l'outil de réglage (si nécessaire) (voir A.3.1.2).
A.3.2 Force à la rotation sous pression
Le dispositif doit être capable de maintenir la force spécifiée dans le tableau A.3 pendant qu'on tourne le noyau.
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A.2.3 Items to be specified in the detail specification
The following items shall be specified in the detail specifications: a) shape of pressurizing cylindrical resin rod (if necessary) (see A.2.2); b) pressurizing force (see A.2.2).
The device shall be a rotating torque measuring apparatus which can measure the twisting moment of the adjusting core accurately.
To test the coil or IFT, position it with the groove of the adjusting core facing upward Use an adjusting driver to rotate the core steadily at approximately 10 r.p.m in both clockwise and counter-clockwise directions At the endpoints of this rotation, apply the specified torque from table A.2 to the rotation stopper for 5 seconds, unless otherwise indicated in the detailed specifications Finally, inspect the specimen for any breakage of the core, damage to the rotation stopper, or idle running of the adjusting core.
Table A.2 – Torque for measurement of strength of rotation stopper
Outside diameter of adjusting screw, D mm
D ≤ 3 As specified in the detail specification
A.3.1.3 Items to be specified in the detail specification
The following items shall be specified in the detail specifications: a) rotating torque (see A.3.1.2); b) shape of adjusting driver (if necessary) (see A.3.1.2).
A.3.2 Strength at rotation under pressure
The device shall be capable of maintaining the force specified in table A.3 while the adjusting core is rotated.
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Adjust the core of the coil or IFT under test to a frequency close to the specified resonance frequency, turning it half a turn to the right and left while applying the force indicated in Table A.3, unless otherwise specified After this adjustment, check for any signs of thread crushing or breakage of the adjustment screw.
Tableau A.3 – Force pour la rotation pressurisée
Diamètre extérieur D de la vis de réglage mm
D ≤ 3 Comme spécifié dans la spécification particulière
A.3.2.3 Articles à spécifier dans la spécification particulière
Les articles suivants doivent être spécifiés dans les spécifications particulières: a) force pour la rotation pressurisée (voir A.3.2.2); b) forme de l'outil de réglage (si nécessaire) (voir A.3.2.2).
La fréquence de résonance de la bobine ou de l'IFT doit être mesurée par l'une des méthodes suivantes: a) la méthode de sortie minimale (voir A.4.1.1); b) la méthode à deux fréquences (voir A.4.1.2).
La fréquence de résonance de l'IFT peut être mesurée par un appareil de mesure utilisant la méthode de la caractéristique de fonctionnement (voir A.4.1.3).
Utiliser le circuit montré à la figure A.1 ou à la figure A.2.
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Rotate the adjusting core of the coil or IFT under test at a frequency near the specified resonance frequency, turning it one half-revolution to the right and left while applying the force indicated in table A.3, unless otherwise stated in the detail specification Subsequently, check for any signs of thread crush or fracture in the adjusting screw.
Table A.3 – Force for pressurized rotation
Outside diameter of adjusting screw, D mm
D ≤ 3 As specified in the detail specification
A.3.2.3 Items to be specified in the detail specification
The following items shall be specified in the detail specifications: a) force for pressurized rotation (see A.3.2.2); b) shape of adjusting driver (if necessary) (see A.3.2.2).
The resonance frequency of the coil or IFT shall be measured by one of the following methods: a) minimum output method (A.4.1.1); b) two-frequency method (A.4.1.2).
The resonance frequency of IFT may be measured by a measuring apparatus employing the operating characteristic method (A.4.1.3).
Use the circuit shown in figure A.1 or figure A.2.
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R G impédance de sortie du générateur de signal
L inductance de la bobine ou IFT à l'essai
C condensateur d'accord de la bobine ou IFT à l'essai
Figure A.1 – Exemple de circuit de mesure par la méthode de sortie minimale
NOTE – Pour l'explication des symboles, voir figure A.1.
Figure A.2 – Exemple de circuit de mesure par la méthode de sortie minimale
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R G output impedance of signal generator
L X coil or IFT under test
L inductance of coil or IFT under test
C tuning capacitor of coil or IFT under test
Figure A.1 – Example of measurement circuit by minimum output method
NOTE – For the explanation of symbols, see figure A.1.
Figure A.2 – Example of measurement circuit by minimum output method
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A.4.1.1.2 Méthode de mesure et formule de calcul
Use the circuit shown in Figure A.1 or A.2, keeping U1 constant, and adjust the frequency of the signal generator until the voltage U2 reaches its minimum Measure the two frequencies f1 and f2 at which U2 increases by A dB (provided that A ≤ 3), and then calculate the resonance frequency fr using the formula \( f_r = \frac{f_1 + f_2}{2} \).
Remove L X in Figure A.1 and shorten it in Figure A.2 In both Figure A.1 and Figure A.2, adjust the resultant resistance from R1 to R6, as viewed from points a and a', to be equal to the resistance of R G as closely as possible.
Dans la prộsente mộthode, choisir le rapport de U 1 à U 2 de faỗon que le point minimal de U 2 soit facilement trouvé.
Utiliser le circuit montré à la figure A.3. générateur de signal
L inductance de la bobine ou IFT à l'essai
C D capacité répartie de la bobine ou IFT à l'essai
Figure A.3 – Exemple de circuit de mesure par la méthode de la résonance série
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A.4.1.1.2 Measuring method and calculation formula
Use the circuit of figure A.1 or figure A.2 Maintain U 1 constant and adjust the frequency of the signal generator so that U 2 becomes the minimum Measure two frequencies f 1 and f 2 at which
U 2 increases by A dB (provided that A ≤ 3) and then calculate the resonance frequency fr from the following formula: f f f r = +